arXiv subjects

G. Moultaka

Publications and source records attributed to G. Moultaka.

39 records · Page 3Linked to original sources

arXiv1995

MSSM radiative contributions to the WW$γ$ and WWZ form factors

We evaluate one-loop contributions to the C and P conserving $WWγ, WWZ$ form factors in the Minimal Supersymmetric Standard Model (MSSM), and in a more constrained Supergravity Grand Unified Theory (SUGRA-GUT). A systematic search of maximal effects in the available parameter space, shows that at LEP2 energy MSSM contributions can hardly reach the border of the most optimistic accuracy expected on those couplings, even for particles close to their production thresholds. At NLC energies, the effects are more comfortably of the order of the expected sensitivity, and may therefore provide useful information on MSSM parameter values which will not be available from direct particle production. We also discuss briefly some variance with other studies.

hep-ph↗

arXiv1994

Fermion and Sfermion Effects in $e^+ e^-$ charged Higgs pair production

Top and bottom one loop corrections to $e^+e^-\rightarrow H^+ H^-$ are considered at NLC energies and found to be significantly large and negative over the full range of $tan \, β$. Moreover, loop effects of moderately heavy squarks and sleptons in the minimal supersymmetric extension of the standard model, tend to cancel partly or fully these large corrections, thus providing a useful indirect information about the supersymmetric sector. The overall effect can still range between $-25 \%$ and $+25 \%$, however lies typically around $-10 \%$ in a wide range of the model parameters.

hep-ph↗

arXiv1993

Poking at the Correspondence Principle with Derivative Couplings

It is shown that quantum mechanical systems obtained from a heuristic path integral quantization of lagrangians of the form $ L= \sum_{n} \frac{1}{n!} f_n(q) \dot{q}^n $ violate in general the correspondence principle, unless $L$ is not more than quadratic in $\dot{q}$. The field theoretic counterpart of this result and its consequence on models of interacting scalar and vector fields and particularly the electroweak interactions, are briefly discussed.

hep-ph↗